[W(CO)5]-Catalyzedendo- orexo-Cycloisomerization Reactions of 1,1-Disubstituted 4-Pentyn-1-ols: Experimental and Theoretical Studies
作者:José Barluenga、Alejandro Diéguez、Félix Rodríguez、Francisco J. Fañanás、Tomás Sordo、Pablo Campomanes
DOI:10.1002/chem.200500537
日期:2005.9.19
The [W(CO)5]-catalyzed cycloisomerization reaction of 1,1-disubstituted 4-pentyn-1-ol derivatives has been studied from both, an experimental and theoretical point of view. Three different catalytic systems have been evaluated preformed [(thf)W(CO)5], [W(CO)6]/excess Et3N, and [W(CO)6]/2 mol % Et3N]. We have found that the reaction proceeds to give the formal endo- or exo-cycloisomerization products
Amidyls in radical cascades. The total synthesis of (±)-aspidospermidine and (±)-13-deoxyserratine
作者:Anne-Claude Callier-Dublanchet、Jérôme Cassayre、Fabien Gagosz、Béatrice Quiclet-Sire、Lisa A. Sharp、Samir Z. Zard
DOI:10.1016/j.tet.2008.02.107
日期:2008.5
Concise routes to aspidospermidine and 13-deoxyserratine are described, hinging on a cascade starting from an amidyl radical and allowing the construction of the key indolizidine cores in one step. (C) 2008 Elsevier Ltd. All rights reserved.
Tandem [W(CO)<sub>5</sub>]-Catalyzed Cycloisomerization-Cyclopropanation Reactions Directed toward the Synthesis of Eight-Membered Carbocycles
作者:José Barluenga、Alejandro Diéguez、Félix Rodríguez、Francisco J. Fañanás